evolution: bird origin questionable (Introduction)

by David Turell , Sunday, December 31, 2023, 16:40 (118 days ago) @ David Turell

From dinosaurs, but when?:

https://evolutionnews.org/2023/12/fossil-friday-fossil-bird-tracks-expand-the-temporal-...

"The origin of birds involves a severe problem for Darwinists, which paleo-ornithologist Alan Feduccia has called a temporal paradox (1994, 1996). The paradox lies in the fact that primitive fossil birds are contemporaneous with or even appear earlier in the fossil record than their assumed theropod dinosaur ancestors. This is the opposite of the natural expectations from a Darwinian point of view, and therefore has to be explained away with ad hoc hypotheses such as ghost lineages, which are long spans of existence of groups that leave no fossil record.

***

"Now, a new discovery published in the journal PLOS ONE may have made the notorious temporal paradox of birds even worse — much worse — because it extends the existence of bird-like forms many million years further into the past, preceding any of the less bird-like theropods.

"Earlier this month, a team of scientists from the University of Cape Town (Abrahams & Bordy 2023) reported the identification of bird-like footprints from the Upper Triassic of Lesotho in southern Africa, which are at least 210 million years old. Actually, the fossil tracks were already discovered and described by paleontologist Paul Ellenberger in the mid 20th century and classified as ichnogenus Trisauropodiscus. The validity of this ichnogenus was later questioned by other scientists, and an avian affinity has been hotly debated. Abrahams and Bordy re-examined original field material, casts, historical photographs, and interpretative sketches in previous publications. Based on this revision they could identify “two distinct Trisauropodiscus morphotypes, one of which resembles footprints made by birds.”

***

"Consequently, the press release of the discovery says that “unknown animals were leaving bird-like footprints in Late Triassic Southern Africa” (PLOS 2023), and Smithsonian Magazine commented that “mysterious creatures with bird-like feet made these tracks long before birds evolved” (Kuta 2023). In the same spirit, another commenter (Yazgin 2023) asked “who made the footprints if the earliest known birds didn’t emerge until at least 50 million years later?” and answered: “Until the fossil of an animal that lived at the right time, in the right place, and with the right proportions is found, the mystery of who created the Trisauropodiscus tracks remains.”

"To be clear: nothing in these fossil footprints themselves suggests that they are anything but bird tracks, but they have to reinterpreted as something else to protect the evolutionary narrative from inconvenient conflicting evidence and unsolved mysteries. Theory trumps data in evolutionary biology."

Comment: hopefully the fossil gap will be explained by new discoveries. Whatever made the tracks was large enough to make the impressions.